Leading Clean Room Manufacturers

Clean rooms are enclosed spaces inside which the level of contamination and pollutants like chemical vapors, dust and airborne microbes are reduced and controlled. Cleanrooms also control a wide range of environmental aspects and atmospheric conditions, such as air pressure, humidity, moisture and temperature. Read More…

Clean Rooms Clean rooms are enclosed spaces inside which the level of contamination and pollutants like chemical vapors, dust and airborne microbes are reduced and controlled. Cleanrooms also control a wide range of environmental aspects and atmospheric conditions, such as air pressure, humidity, moisture and temperature.

As a manufacturer of clean rooms, including inplant modular offices, exterior steel buildings, guard buildings, fork liftable and crane liftable buildings, multi-level buildings and mezzanines, Abtech offers turnkey installations or packages for install by end user. Our modular structures are constructed of steel, are free-standing & manufactured under strict quality control methods.

Abtech, Inc. $$$

For the very best of clean rooms, look no further than Clean Rooms International! We can provide the ultimate in quality, customer service, durability, and unique designs just for you!

Clean Rooms International, Inc. $$$

Cleanrooms By United is the industry’s premier manufacturer of modular clean room systems. We design, manufacture and install our clean rooms to meet our customers’ unique requirements. The custom, flexible, modular construction of our cleanrooms makes them easy to expand, reconfigure, or relocate as your cleanroom needs evolve.

Cleanrooms by United $$$

Atmos-Tech Industries is a designer and manufacturer of cleanrooms and equipment for industries, including health care, pharmaceutical aerospace and automotive.

Atmos-Tech Industries $$$

Our design staff is qualified with over 30 years of clean room experience. Our clean rooms are made from the highest quality materials and use a modular design that can be modified to suit any needs.

Clean Air Technology, Inc. $$$

Our complete line of clean rooms will meet your needs. We are the experts of the clean room industry and our engineers can work with you to determine which clean room models work best for your business. We offer a variety of softwall, bio-clean, hardwall, and micro-clean options, all of which are manufactured with the highest standards. You will not be upset with our products. Contact us for more ...

Modular Cleanrooms, Inc. $$$

Bayside Interiors is able to provide the design, engineering and construction of clean rooms. Bayside Interiors Inc. has been around since 1984. We also specialize in the construction of strut framing systems and facility support systems.

Bayside Interiors $$$

BASX Solutions has been designing and manufacturing truly modular cleanrooms since 1984. These are durable, scaleable, portable cleanrooms and are available in both softwall and hardwall designs. Our products meet the highest industry levels, from Class 100 to 100,000. Call for a free quick quote.

BASX Solutions $$$

Since 1976, we at Mitchell Technical Sales have been dedicated to delivering excellence in quality cleanroom design, manufacturing, installation, certification, and maintenance. Our journey has been marked by innovation and expertise, ensuring that every project we undertake reflects our commitment to precision and cutting-edge solutions.

Mitchell Technical Sales $$$

Welcome to Cleanrooms USA, where we pride ourselves on delivering unparalleled expertise and innovative solutions in the realm of cleanroom technology. At Cleanrooms USA, we are dedicated to providing cutting-edge cleanroom environments that meet the stringent requirements of industries ranging from pharmaceuticals and biotechnology to electronics and aerospace.

Cleanrooms USA $$$
Get Your Company Listed
placeholder image

The goal of clean rooms is to provide a space in which users can build critical components and test products for performance, durability, etc. without having to worry about contamination. Clean rooms also allow users to simulate the environment or environments in which an item will be used. Aerospace engineers, for example, can have a clean room built that simulates the air pressure, temperatures, gravity levels, etc. that will be present in the environment an aircraft or spacecraft will operate. Inside this control environment, testing is much more efficient and results are much more accurate.

Clean rooms are essential to applications that rely on pristine air quality and particle elimination. These applications include: optics, aerospace, medical device, biotechnology, software engineering, pharmacological studies, infectious disease testing, and various medical research operations and products testing.

History of Clean Rooms

Cleanroom technology is a fairly recent invention; the first cleanroom was designed by American physicist Willis Whitfield, in 1960, per the request of his employer, Sandia National Laboratories. Sandia was seeking to find a way subvert airborne contamination, particularly in the aerospace, biotechnology, microtechnology and medical industries. Leading up to this invention, workers in those industries working with small and sensitive devices had begun to find airborne contaminants, like dust, to be increasingly disruptive. While clean room-type spaces were available before Whitman’s cleanroom, they were unreliable, had unpredictable airflow, and were largely unable to sufficiently stop air contamination. Whitman’s cleanroom design ushered in a new age, allowing workers to consistently remove impurities with highly filtered air and otherwise strictly control their environment in which they worked. Today, clean room manufacturing is essential to the production of items from cell phones to spacecrafts.

Types of Clean Rooms

Softwall Cleanroom

Softwall cleanrooms are cleanrooms with fabric walls. These fabric walls may either be made from free-hanging plastic strips or fabric stretched tightly over a frame. To divide a softwall cleanroom, manufacturers include curtain dividers. These dividers must be made from a non-corrosive, non-fibrous material that does not generate static electricity, such as vinyl. Softwall cleanrooms are highly portable, and may be designed modularly more efficient assembly and disassembly.

Softwall cleanrooms work well with applications that do not require extreme amounts of decontamination or the most strictly controlled environment. They can be used for more rigorous applications, but only with the assistance of supplementary cleanroom equipment, like air filters.

Hardwall Cleanroom

Hardwall cleanrooms have a strong support frame and panels. They are made from rigid materials, such as stainless steel, welded steel, acrylic, tempered glass, PVC, etc. They are more permanent than soft wall clean rooms. They too, though, are often made with modular construction. They offer excellent environmental and contamination control.

Clean Lab

Clean labs are used in laboratories for medical or pharmaceutical research. They do not necessarily require FDA validation, though clean rooms designed to produce medical and pharmaceutical products do. They may be stationary or mobile. The levels of contamination control, sterility and environmental control they require depends on if they contain biohazards or potentially explosive, flammable or corrosive materials.

Positive Air Pressure Cleanroom

Positive air pressure clean rooms are clean rooms in which more filtered air is pumped into them than exists in the space outside of them. They seek to keep contaminated air out of the room. Positive air pressure cleanrooms are only used for applications that do not involve hazardous substances. This is because, during the operation of positive air pressure cleanrooms, some air will escape from the walls, ceiling or doors.

Negative Air Pressure Cleanroom

Negative air pressure cleanrooms use negative pressure to remove contaminated air from the room. Once the air is evacuated, it must be replaced with clean air. The source of this air is either the evacuated air, which has been run through filters, or fresh filtered air. Negative air pressure cleanrooms are required for cleanroom applications that involve hazardous chemicals, whether they be biohazardous or flammable, potentially explosive, etc.

Modular Cleanroom

A modular clean room is a cleanroom with factory pre-cut components that is assembled on site. Modular cleanrooms can quickly and easily be disassembled and reassembled for application changes. Modular design is valued for its low-cost materials, basic construction and overall versatility.

Modular cleanrooms are widely used in manufacturing and research facilities where a controlled environment is required to carry out processes. Pharmaceutical and medical industries are among those with stringent cleanliness standards. A cleanroom has low levels of contaminants such as dust, airborne microbes, aerosol, and chemical vapors. The air quality in cleanrooms is expressed in terms of particle count and size. Any application where small particles can negatively affect processes stands to benefit from the use of modular cleanrooms.

Portable Cleanroom

Portable cleanrooms are built on casters for mobility. They are typically used in conducting raw material testing of a pharmaceutical manufacturing facility. The pharmaceutical industry primarily uses cleanrooms to comply with the stringent requirements and standards to produce medicines. Each step of the pharmaceutical production process requires sterile and clean environments to prevent any form of contamination that may affect the quality of the finished product. These Design-Build Portable cleanrooms serve as a quarantine facility of raw materials until required quality control testing procedures are completed.

They can be customized based on ISO 5-8 cleanroom requirements. They are also available in various sizes and materials. Frames can be made of steel or aluminum, and walls can be a combination of solid and fabric materials. Strip wall made of soft material allows entry and exit of forklifts that carry the raw materials into the cleanroom. Air change rates for cleanrooms can also be specified.

Advantages of Modular Cleanrooms Over Stick-Built Cleanrooms

A cleanroom is a capital investment, and all factors must be thoroughly analyzed during budgeting because all aspects will be significant in determining the return on investment. A cheap acquisition does not mean greater savings. An upfront, low-cost purchase is not beneficial when time, labor costs, and quality are considered. While the cost of cleanrooms varies depending on process requirements, modular cleanrooms far outdo stick-built cleanrooms in virtually all scenarios.

  1. Modular cleanrooms offer high flexibility. Modular cleanrooms can be easily reconfigured, expanded, and relocated, unlike stick-built cleanrooms. Structural modifications on stick-built cleanrooms require invasive and complicated procedures, which cost a lot of time and money.
  2. Modular cleanrooms have a shorter turnaround time. Construction of modular cleanrooms can be completed 30% to 50% faster than stick-built constructions. Modular cleanrooms use standard materials and require little to no modification during installation. Moreover, modular constructions generate little dust, which reduces clean-up time, allowing immediate operation start-up.
  3. Modular cleanrooms are associated with tax savings. Modular cleanrooms are considered capital equipment rather than building or leasehold improvement as stick-built cleanrooms are. This means that modular cleanrooms qualify for accelerated depreciation. This results in tax savings.

A modular cleanroom system is worth the upfront price if it has the following characteristics.

Durability. High-pressure laminate (HPL) is a top-quality material for modular cleanroom wall and ceiling panels. Its outer layer is made of high-pressure plastic laminate, while the inner layer consists of cellulose fibers impregnated with resins. This type of panel is non-porous, making it a hygienic material. It also has high impact and wear resistance. With the use of durable materials such as HPL, there are lower maintenance costs, resulting in higher savings.
Excellent Design.HPL panels can be easily milled for the installation of accessories such as intercoms, switches, and air return grilles. They also have an anti-scratch property that maintains their appearance for years. Furthermore, modular cleanroom suppliers help their clients comply with the GMP and FDA requirements for cleanrooms; this makes the cleanroom perfectly suitable for the client-specific application.
Easily Cleaned. HPL panels have high resistance to sanitizing agents, making their cleaning simple. They do not degrade when in contact with various aggressive cleaning agents, even in the unlikely case of a layer being exposed due to scratching. This feature also reduces maintenance costs.

Clean Rooms
Clean Rooms – Atmos-Tech Industries

Clean Room Equipment Components

Clean rooms generally come with an air quality control system of some type, like air filters, fans, and pumps. The best kept clean rooms have air flow that is controlled by directional air filters that encourage a laminar air flow; using laminar air flow ensures that new, filtered air continuously cycles into the clean room and removes any lingering contamination. Common and highly effective filters used in cleanrooms include High Efficiency Particulate Air (HEPA) filters and Ultra Low Particulate Air (ULPA) filters. HEPA filters can trap particles sized .3 microns and larger. ULPA filters provide an even more rigorous performance.

Inside clean rooms, you may find cleanroom furniture, such as a cleanroom table, cleanroom wall, laminar flow bench or laminar flow hood.

Note that, to keep from tracking in particles, operators and other personnel must don proper clean room apparel; humans shed 100,000 particles of dead skin cells per minute just while standing! Apparel to cover up human skin and hair, which is around 100 micrometers wide, includes shoe covers, beard covers, bouffant caps and face masks, as well as accessories like approved cleaning wipes. In addition, these efforts may be amplified by the use of air showers, which are small rooms in which personnel step to rinse off prior to entering a clean room.

Clean Room Benefits

Cleanrooms are fantastic, and there are a number of reasons to choose them for your application. First, with impurities gone, your system or the product you’re working is far less likely to malfunction or break down. Second, you can work on, study or use far more sensitive materials or technology than you could without a cleanroom. This is because, without a cleanroom, those items would be compromised and your work would be rendered inaccurate, unsafe or inefficient. By using a cleanroom, you are also able to cultivate and surround your product with a miniature or even micro environment. For instance, by establishing constant positive pressure within your cleanroom, you can create a clean room environment that contains leaks. Or, by creating a cleanroom environment with constantly low humidity, you can control electrostatic discharge. Finally, thanks to each of the advantages you’re gaining, with a clean room, you’ll also find yourself saving time, money and energy, while gaining a reputation for better work or products.

Cleanroom Design and Customization

When designing a clean room, manufacturers focus on making sure that it is a space in which the environment is sufficiently controlled and particulates are sufficiently kept out. How they go about that depends on the application and its requirements. For example, clean rooms may be permanently established, or they may have a portable or modular design. Permanent clean rooms and the machines that regulate their conditions are usually incorporated into the structures of the buildings that house them. Sometimes, though, they are enclosed by clear plastic walls or glass instead.

Manufacturers also customize their designs by size and material. Cleanrooms may be warehouse-sized, as they often are for microelectronics, circuitry, and pharmaceutical product manufacturing; these are called ballrooms. Alternatively, when built for small-scale medical testing, repairs, or limited, exclusive, or specialized operations, they may be only the size of home kitchen ovens.

Selected materials have to meet the strict criteria so that the clean room can be effective. Namely, they cannot contribute to air contamination. Like softwall clean room materials, general cleanroom construction materials must be non-fibrous, non-static electricity-generating and non-corrosive. Even stainless steel is sometimes avoided, because it can corrode when exposed to bleach. Common materials from which clean room components are made include: acrylic (economical, easy to clean, tintable, great tensile strength), static dissipative PVC (protects against electrostatic discharge and particulate contamination), polycarbonate (high tensile strength, shatter resistant, acid resistant, cleaning solution resistant, solvent resistant), tempered glass (clear, broadly chemical resistant, non-porous, easy to clean) and polypropylene (superior chemical and acid resistance).

There is no end to the custom cleanroom supplies and accessories that manufacturers may add to your cleanroom system. Examples of these include: electric heaters, smoke detectors, intercoms, door interlocks, central vacuum systems, clean room foggers, ductwork, electrical outlets, process piping, top decks and more.

Clean Room Safety and Compliance Standards

Clean rooms are rated on a scale of anticipated contaminant control. Cleanroom manufacturers may choose to measure and classify them using one of four safety and compliance standards, which are: US FED STD 209E, ISO 14644-1, EMP EU, and BS 5295.

Using US FED STD (federal standards) 209E, cleanrooms are arranged in class numbers that correspond with the amount of .5-plus micrometer-sized particles per cubic foot of air contained in the room. Larger numbers are assigned to clean rooms with a higher number of particles allowed in the air. Manufacturers select clean rooms based on application requirements accordingly. For example, for a process that could cause a chemical reaction or wear on the environment around it, a manufacturer should select a Class 100 clean room, which is made of materials that won’t release fibrous contaminants. For a less sensitive application, such as one that will not break down soft materials like plastics or flexible acrylics, a Class 10,000 clean room, which features soft walls and less strict controls, is an appropriate choice. Particles are measured with the help of a discrete particle counting device.

Using International Organization for Standardization (ISO) standards, clean rooms are arranged on a scale from three to eight, with three being the most effective. For reference and comparison, an ISO Class 5 clean room, which permits up to 100,000 particles per cubic meter, is the equivalent of a Class 100 US FED clean room.

Some industries do also use EMP EU standards, which are customary in the European Union, as well as BS 5295 standards, which are British cleanroom standards. When this is the case, they measure contaminants by the cubic meter, not cubic foot. In the USA, we most often speak in terms of US FED standards.

In addition to those standards by which all clean rooms are defined, your clean room may require additional certification, depending on your application and industry. This is typically the case with the FDA. Many industry cleanroom standard requirements (like medical standards) are covered under ISO and US FED standards. To learn just what you need, consult with your manufacturer, industry leader and/or the appropriate governmental organization.

Things to Consider Regarding Clean Rooms

If you’re thinking about a cleanroom or cleanroom product purchase, there are a few things you should consider. First, what is your application? What are your goals? This will inform the features that you look for in a clean room, i.e. modularity, softwall paneling, sprinklers, humidifiers, blowers/fans, windows, etc. This will also inform the level of contamination control and environmental control that you need.

Armed with your list of specifications, your next step is to reach out to a quality clean room supplier or manufacturer. Remember that manufacturer is about more than product availability and price; it’s also about customer service. You want a manufacturer you can trust to listen to you and keep your best interests at the forefront of the project. You need a manufacturer who will go the extra mile for you. Find one of these by checking out the many reputable contract manufacturers and suppliers that we list right here on this website. Here you’ll find company profiles, website links, request for quote links and contact information for some of the top providers in the industry.

Check out our Environmental Test Chambers website

Clean Room Informational Video


Clean Rooms Power Pages



A cleanroom is a specially designed enclosed space where airborne particulates have been limited or removed by a highly sophisticated filtration system. They are used by industries that require a highly controlled and monitored environment for the production...

Portable Cleanrooms

Portable Cleanrooms

A portable cleanroom is a compact system that requires little space, provides mobility, is cost effective, and offers exceptional clean and filtered airflow to create an uncontaminated and sanitized environment. They are a modular designed room where...

Softwall Cleanrooms

Softwall Cleanrooms

A softwall cleanroom is a confined controlled space with a metal frame, clear panel walls, an entrance, high efficiency particulate air (HEPA) filters, and exceptional lighting that is designed to provide a contaminant and particulate matter free workspace...

Cleanroom Products

Cleanroom Products

Cleanroom products are specially designed and engineered to prevent the contamination and pollution of highly sensitive cleanroom environments. For a cleanroom to receive its level of classification, it is required to be cleaned, constructed, and sanitized to meet a list of qualifying conditions and standards....

Modular Clean Rooms

Modular Clean Rooms

A modular clean room is a prefabricated, controlled environment that is constructed to limit the presence of sub-micron particulates. These specially designed rooms are assembled using prefabricated panels inserted into a frame. They are purchased as a kit to be assembled or can be constructed by a technician...

Types of Cleanrooms

Types of Cleanrooms

A cleanroom is a specially designed and configured room that has been constructed to eliminate dust particulates and atmospheric contaminants. They are commonly used for scientific research, pharmaceutical production, and other industries that produce products that can be damaged by unsanitary or polluted conditions...

Environmental Chambers

Environmental Chambers

An environmental chamber is an enclosure used to test the effects of a variety of conditions on a product, component, part, or assembly. These highly technical pieces of equipment are capable of simulating the types of conditions a product may face while in use...

Modular Buildings

Modular Buildings

Modular buildings are buildings made up of standardized sections, called "modules," manufactured in a controlled environment of a factory away from the building's future location. The common factory-made, standard modules include walls...

Altitude Chambers

Altitude Chambers

An altitude chamber is a test chamber that is designed to simulate the altitude, vacuum, and temperature of environmental conditions at heights that match the flight patterns of all forms of aircraft, from commercial to military...

HEPA Air Filters

HEPA Air Filters

A HEPA filter is a high efficiency pleated air filter capable of capturing extremely small particulate matter down to particles that are the size of a micron (µ), or a micrometer, which is 1/1000th of a meter...

Test Chamber

Test Chamber

A test chamber is a managed and controlled environment used to test the endurance, stability, and practicality of equipment, products, and chemicals. They are a controlled enclosure that mimics the effects of environmental conditions that a product may encounter during its usage...

Prefabricated Buildings

Prefabricated Buildings

Prefabricated buildings, or prefabs, are buildings with components (walls, roof, and floor) that are manufactured in a factory or manufacturing plant. These components can be fully or partially assembled in a factory which is then transferred at the construction site...

Test and Measurement Equipment

Featured Industries